there were direct economic aftershocks from the war, arising from the destruction of things...farms, roads factories and the like. Marshall could help with that. There were seconday effects, in that many nations had foregone investment in economic and military development. An example of that wass Frances naval and mercantil shipbuilding industry. It needed a major injection of funds to modernise. so too her aircraft industry. Marshall could probably help with that as well
but there were things that a Marshal Plan could not have helped. Even though the WWI losses were a fraction of those of the next war, combined with the flu pandemic, they were considerably highers, and tended to be concentrated in a fewer number of nations. All the European nations were just about bankrupt, and all had suffered major manpower losses. this was largely before the emancipation of women. A Marshall plan could not replace the fallen sons of France (or any other country), which meant she did not have the manpower to "go to work" and fix some of her war problems.
for France, there was something else though, something that would prevent her from being effective in the 2nd war. I think it manifested itself most immediately in the falling birth rate in france, but it also affected the national morale. this was certainly reflected in the highly unstable political situation in France between the wars.
Psychologically, I think this affected Frances ability to embrace and look for change. Her army attrified, resisted change, failed to replace older officers with new forward thinking ones. I think that can be linked to her wartime experiences. Certainly some of that arose from a warped victory dosease ("why change what aint brok")m but htough she had won, it came at a terrible cost to her, and this I think affected tghe national mood for a very long time. It might also explain where all those surly French waiters get their attitude from as well.....